grave robber dancing team comp darkest dungeon

The stun prevents the enemy from acting while you set up the Lunge so even though you're spending the first round on a non-damaging attack you're ultimately still going to prevent that enemy from getting any actions. It's a little worse off in a sustained fight though. This is more flexible since you're not restricted to dancers-which makes it much easier to use blighters if you desired since pretty much every dancer (including SB) will screw up your dancing-and also helps to keep the GR more protected. The alternative is opening with Shadow Fade, having another hero stun whatever you want the GR to kill, then Lunging on the second turn and fighting with daggers/pick from there. The result is a fairly bursty party but since it tends to have poor damage prevention (the only stunners available are MaA and whatever you put in rank 4, which will probably be a Vestal who's quite poor at stunning) it is quite vulnerable to getting burst down itself. As others mention above, the typical way she's used is that you pair her with two other dancers so that she can spam Lunge every turn. The main question from there is how you build the party. Even in a dancing party Shadow Fade will at least let you reposition if you get surprised so I've never found Flashing Daggers to provide much of use.

Flashing Daggers technically isn't useless, but it isn't providing you any super-important utility-Thrown Dagger and Pick round out the weaknesses of Lunge (no rank 4 targeting and no self-contained way of dealing with PROT respectively) whereas Flashing Daggers is just slightly more efficient than Thrown Dagger if it happens to be able to kill an enemy. I always run Lunge/Shadow Fade/Pick to the Face/Thrown Dagger. As you've seen, Thrown Dagger is very weak even if you build around blight. There's also no reason to ever not run Lunge, since Lunge is basically the only reason to take GR over other DPS heroes in the first place. There's basically no reason to ever run Poison Darts or Toxin Trickery-they're too weak to really care about, especially since the former requires a trinket to make consistent.

Grave robber dancing team comp darkest dungeon